CN104316816B - A kind of single-phase resident's electric energy meter is visited one house after another investigation method - Google Patents

Abstract

The invention discloses a single-phase resident electric energy meter serial household checking method. The method adopts the zero line shunting method for checking, and wires or cables are used to short-circuit the zero line row and the customer load-side zero line one by one, and the wire shunts the zero line current, shorting the zero line. After the connection, the zero line current of each part of the same circuit will be reduced to half of the original. In this way, find out the circuit breaker and electric energy meter that are actually connected to the customer, and compare it with the electric circuit breaker and electric energy meter marked as the customer, and marketing Business application system file comparison, if inconsistent, there is collusion. The present invention only uses one lead wire and a common clamp ammeter to quickly find out whether the electric energy meter is connected to the household and the specific conditions of the connected household under the condition that the user does not cut off the power supply and does not increase the load. The invention is simple and easy to implement, has less equipment, less investment and obvious effect.

Description

A single-phase household electric energy meter string household investigation method

technical field

The invention relates to a single-phase resident electric energy meter serial checking method.

Background technique

With the construction of the smart grid, the installation and replacement of smart energy meters have been carried out nationwide, and a large number of low-voltage single-phase residential users generally use single-phase multi-meter electric energy meter boxes, and multi-household electric energy meters are centrally installed in the meter boxes. Meters and control switches are prone to collusion, that is, other people use electricity and I pay the electricity bill, which leads to errors in metering and electricity bills, brings losses to electricity customers, and seriously affects the image of power supply companies. In this article, the serial connection refers to the connection between the electric energy meter and the circuit breaker (control switch), between the circuit breaker and the internal line of the user.

In the past, there are two ways to check the energy meter serial households. The first way is to conduct a door-to-door investigation by shutting off the overall power of the meter box and then sending power one by one. This method needs to cut off the power to all users in the meter box, which is not allowed by relevant laws and regulations. As users' awareness of rights protection becomes more and more It is unrealistic to be strong today. The second way is to increase the load of the user, and check by observing the change of the power of the meter before and after the load (dial speed or pulse speed). It is not advisable to increase the electricity bill.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method that can quickly and conveniently check the situation of single-phase residential electric energy meters being connected to households without power failure and without increasing customer load.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a single-phase household electric energy meter serial household investigation method, the method steps are as follows:

1) Check the phase wire and neutral wire of a customer load with an electroscope pen to find out the neutral wire;

2) When the load is stable, use a clamp ammeter to quickly test the current of the outgoing line of the electric energy meter, the incoming line of the air breaker, and the outgoing line of the air breaker of each household;

3) Use a wire or cable to short-circuit the neutral line of the neutral line and the zero line of the customer's load side, and use a clamp ammeter to quickly test the current of the outgoing line of the electric energy meter, the incoming line of the air breaker, and the outgoing line of the air breaker, and judge;

The current of the electric energy meter and the neutral line of the circuit breaker of the same circuit should be equal before short-circuiting. The load is in the same circuit, that is, the circuit breaker and the electric energy meter actually connected to the customer's load are found;

4) Use the above method to find out the circuit breakers and electric energy meters actually connected to other customer loads;

5) After completing the above steps, compare the air switch and energy meter actually connected to all customer loads with the customer air switch and energy meter marked on site, and compare with the marketing business application system file. If there is any inconsistency, there is a collusion. And it can judge the specific situation of the cross-connection, whether the cross-connection occurs at the electric energy meter, the open space or the internal line.

The beneficial effect produced by adopting the above-mentioned technical scheme is that the present invention can quickly find out whether the electric energy meter is connected to the household or not without the user’s uninterrupted power supply and without increasing the load by using a wire and an ordinary clamp ammeter. specific situation. After many tests and verifications, this zero line shunt method can be used to check the chain connection of electric energy meters without power outage and without increasing the user load. The effect is obvious. Adopting this method is of very practical value for the power supply company to provide high-quality services, reduce customer losses, and effectively reduce complaints.

Description of drawings

Fig. 1 is a schematic diagram of multi-table meter box wiring under normal conditions;

Fig. 2 is the schematic diagram that the present invention short-connects zero line method and checks the serial household;

The air switch in this article is the air switch.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

1. First, analyze the reasons for the following single-phase residential electric energy meters to be connected to one another

Figure 1 is a schematic diagram of the multi-meter meter box wiring (taking two meter positions as an example). After the main power switch of the meter box is closed, the power is distributed to the electric energy meters of each household through the zero line row and the phase line row. In order to facilitate the shutdown of each household For power transmission, a unipolar isolating switch is added to the incoming side of the phase line of the electric energy meter to control the user to stop power transmission, and the outgoing line of the electric energy meter is connected to the customer's air switch so that the customer's load can use electricity normally.

Under normal circumstances, the customer's energy meter and air switch correspond to the customer's load one by one, and are consistent with the files of the power supply company. Once the energy meter marked as a customer is connected to the air switch marked as other customers, or the air switch marked as a customer is connected to other indoor lines (on the load), there will be a series of accounts, and the customer's energy meter will have a measurement error, which is marked as The power of your own energy meter is not the power you use.

2. Principle and method of investigation of the present invention:

Refer to attached picture 2, use the zero line shunt method to check, use wires or cables to short-circuit the zero line bar and the customer load side neutral line one by one, the wires will shunt the neutral line current, and after shorting, the zero line current in each part of the same circuit will be reduced to the original Half, use this method to find out the air switch and energy meter that are actually connected to the customer, compare it with the air switch and energy meter marked as the customer, and compare it with the marketing business application system file. If they are inconsistent, there is a chain of accounts .

The specific investigation steps of the present invention are as follows:

Check the phase line and neutral line of a customer's load with an electroscope pen to find out the neutral line.

When the load is stable, use a clamp ammeter to quickly test the current of the outgoing line of the electric energy meter, the incoming line of the air breaker, and the outgoing line of the air breaker of each household.

Use a wire or cable to short-circuit the neutral line of the zero line and the zero line of the customer load side, and use a clamp ammeter to quickly test the current of the outgoing line of the electric energy meter, the incoming line of the air breaker, and the outgoing line of the air breaker.

The current of the electric energy meter and the neutral line of the same circuit should be equal before short-circuiting, and the current of the electric energy meter and the neutral line of the same circuit after short-circuiting should also be equal, but the current of the neutral line after short-circuiting is significantly reduced (about 1 /2) The electric energy meter, circuit breaker and customer load are in the same circuit, that is, the circuit breaker and electric energy meter actually connected to the customer load are found.

Note: The test time should be as short as possible, and the load will change greatly if the time is long.

In the same way, find out the circuit breakers and electric energy meters actually connected to other customer loads.

The air switches and electric energy meters actually connected to all customer loads are compared with the customer air switches and electric energy meters marked on site, and compared with the marketing business application system files. In the specific situation, whether the serial account occurs at the electric energy meter, the open space or the internal line.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (1)

1. A kind of investigation method 1. single-phase resident's electric energy meter is visited one house after another, it is characterised in that：This method step is as follows：

   1）The phase line and zero line of certain client's load are checked with electroscope, finds out zero line;

   2）The outlet of each household electric energy meter is quickly tested with clamp on amperemeter in the case of steady load, is spaced apart inlet wire, is spaced apart outlet Electric current;

   3) with wire or cable short circuit zero line row's zero line and client's load side zero line, each household electricity is quickly tested with clamp on amperemeter The outlet of energy table, it is spaced apart inlet wire, is spaced apart the electric current of outlet, and judges;

   The same circuit electric energy meter before short circuit, be spaced apart neutral line current should be equal, the same circuit electric energy meter after short circuit, be spaced apart neutral line current Also it is equal, but the neutral line current after short circuit significantly reduce electric energy meter, be spaced apart with client's load the same circuit, that is, have found this visitor Family load is actual being spaced apart of connecting and electric energy meter；

   4) find out in aforementioned manners other client's loads it is actual connect be spaced apart and electric energy meter;

   5) after completing above-mentioned steps, all client's loads are actual connect be spaced apart, the client of electric energy meter and scene mark is spaced apart, Electric energy meter compares, and is compared with sales service application system file, if any inconsistent, there is and visits one house after another, and can judge what is visited one house after another Concrete condition, it is at electric energy meter, is spaced apart at place or interior lines and visits one house after another.